[1] Triangle T(n,k) of rencontres numbers (number of permutations of n elements with k fixed points).OEIS:A008290
[2] List of permutations of 1,2,3,...,n for n=1,2,3,..., in lexicographic order.OEIS:A030298
[3] Take the permutations of lengths 1, 2, 3, ... arranged lexicographically, and replace each permutation by the number of its fixed points.OEIS:A170942
[4] /Permutations#Statistics